Longitudinal Redundancy Check definition storage, communications
(LRC, Block Redundancy Check) An error checking method that generates a longitudinal parity byte
from a specified string
or block of bytes
on a longitudinal track.
The longitudinal parity byte is created by placing individual bytes of a string in a two-dimensional array
and performing a Vertical Redundancy Check
vertically and horizontally on the array, creating an extra byte. This is an improvement over the VRC because it will catch two errors in the individual characters of the string, beyond the odd errors.